Abstract
Manganese dioxide formed in oxidation process by potassium permanganate exhibits promising adsorptive capacity which can be utilized to remove organic pollutants in wastewater. However, the structure variances of organic molecules lead to wide difference of adsorption efficiency. Therefore, it is of great significance to find a general relationship between removal rate of organic compounds and their quantum parameters. This study focused on building up quantitative structure activity relationship (QSAR) models based on experimental removal rate (r exp) of 25 organic compounds and 17 quantum parameters of each organic compounds computed by Gaussian 09 and Material Studio 6.1. The recommended model is r pre = −0.502 − 7.742 f(+)x + 0.107 E HOMO + 0.959 q(H+) + 1.388 BO x. Both internal and external validations of the recommended model are satisfied, suggesting optimum stability and predictive ability. The definition of applicability domain and the Y-randomization test indicate all the prediction is reliable and no possibility of chance correlation. The recommended model contains four variables, which are closely related to adsorption mechanism. f(+)x reveals the degree of affinity for nucleophilic attack. E HOMO represents the difficulty of electron loss. q(H+) reflect the distribution of partial charge between carbon and hydrogen atom. BO x shows the stability of a molecule.
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This work was supported by the National Science Foundation of China (Project No. 21177083), and the program for New Century Excellent Talents in Shanghai Jiao Tong University.
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Su, P., Zhu, H. & Shen, Z. QSAR models for removal rates of organic pollutants adsorbed by in situ formed manganese dioxide under acid condition. Environ Sci Pollut Res 23, 3609–3620 (2016). https://doi.org/10.1007/s11356-015-5569-1
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DOI: https://doi.org/10.1007/s11356-015-5569-1